|
|
Training center
Matoulková, Simona ; Klubal, Tomáš (referee) ; Brzoň, Roman (advisor)
Diploma thesis deals with design documentation of training centerm determined to services for public. Building is situated in Královéhradecký region, in Náchod, cadastral district Náchod, located on 1150/1, 1151/6 and 1152/1 building plots with 1949 m2 area. Trainig center has three floors. In the first floor there is nursery school and in the second and the third floor there are situated rooms of the training center with administration. Center has wheelchair access and private parking spaces. The building is designed as a brick building with Isover insulation system with ventilated facade. Vertical supporting structure is from KM Beta Sendwix and Spiroll ceiling panels – the horizontal supporting structure. The building has not walkeble flat roof structure. Zhe inclination is performed by thermal insulation at a gradient of 3%. For heating there is designed Schiedel Absolut chimney.
|
|
|
The Process of Repair Vheel Set
Vaculík, František ; Prokop, Jaroslav (referee) ; Osička, Karel (advisor)
Diploma work describes in its theoretical part particular types of pairs of wheels used on railway vehicles in Czech Republic as well as their components and assembly instructions. Practical part describes workplace for wheels in reparation DPOV, a.s. at repairing centre Nymburk, its facilities and repairing possibilities by total repair of pairs of wheels. Practical part brings at the end particular report with results of pairs of wheels measuring.
|
|
|
Application of PVD coatings for face milling
Jaroš, Aleš ; Humár, Anton (referee) ; Píška, Miroslav (advisor)
Diploma thesis is focused on the application of PVD coatings for face milling. The theoretical part, systematically, deals with the division of coating methods. PVD method is stressed here. Treatment of material before coating is described as well. The machine, the machine tool and cutting material is described in the experimental section. The aim of the work was comparison of coating exchangeable cutting tips (VBD) to uncoated ones. Based on experiment, it is clear that the use of PVD coatings resulted in reduction of cutting powers and lifetime was increased.
|
|
|
The development of grouting for additional sealing of embankment dams
Michalčíková, Magdaléna ; Klablena,, Petr (referee) ; Drochytka, Rostislav (advisor)
Seal of sand or gravel by chemical injection is known and used for a long time. Chemical grouting are however expensive and sometimes the use of cement does not lead to desire effects. So it is trying to find new materials and methodologies injection arrangement works. To achieve savings of chemical products are added to a mixture clay and cement. Clay-cement grouting mix are used not only in order that they are better quality, but also because in this way proposed mixtures have a tendency to penetrate better into incoherent sediments that need additional sealant of chemical injection. For further possible reductions of economic terms the mixture is trying to replace the classic clay. As a suitable substitute for classic clay is to a certain extent the use of secondary raw materials. Above all it is fly ash. As a part of my thesis I deal with the appropriateness use of these materials and examining their properties in the mixture. It was found that by using fly ash were improving consistency of the fresh mixture, reducing the amount of water-cement ratio and reduce shrinkage of the mixture. On the other hand, by using fly ash has been increasing decantation, permeability atc. In the next stage of my work was examined the influence of the quality of cement, lime and liquefaction in the mixture. The aim of thesis is to propose the optimal injection mixture for additional sealing earth dams.
|
|
|
Dependence of a price and a building period of selected construction on the technology
Jandová, Renáta ; Aubusová,, Alena (referee) ; Tichá, Alena (advisor)
The thesis focuses on the dependence of price and building period of selected construction on the technology of the certain object. Three different technologies are being compared regarding the supporting structure of the bridge. The first two technologies consider girder prefabs and the third technology involves a monolithic support plate. The technological method no. 1 is implemented through assembling of the girders via conveyor line with the assistance of mobile cranes; the method no. 2, on the other hand, implies the whole assembly from below the bridge also using mobile cranes. The method no. 3 is monolithic – the wooden basis is covered with concrete layer. The dependence of construction time and price is carried out by the comparison of methodologies through budgets, schedules, multi-criteria ratings and economic ratings.
|
|
|
The development of self-compacting concrete with fast runs of strength and elasticity modulus
Skřivánek, Michal ; Hela,, Vlastimil (referee) ; Hela, Rudolf (advisor)
My bachelor thesis is about a development of self-compacting concrete. The main advantage of this method is a shorter duration of producing strength concrete and also modulus of elasticity. My analysis consists of describing self-compacting concrete properties, methods for speeding up the process of building strength concrete from less effective heating to using advanced concrete admixtures. Further, an important chapter about influence of concrete mixture composition on modulus of elasticity measurements and in-depth analysis of the SCC mixture composition. Theoretical part is ended by a summary of SCC properties in a fresh or hardened state – all experiment specifics are included. In order to deliver a shorter duration of producing strength concrete and modulus of elasticity in early stages of curing, every SCC mixture mentioned in practical part have been carefully created based on achieved theoretical knowledge with a goal to minimize the impact on rheology of concrete mixture.
|
|
|
Development of structural concrete with power plant ash
Ťažký, Martin ; Sokol, Pavel (referee) ; Hela, Rudolf (advisor)
Worldwide production of concrete is increasing, what has a negative environmental load of cement production. That is due to effort in building construction, also concrete production, greater use of the secondary raw materials. Fly ash is the most commonly used secondary raw material. His used has a very good impact on the economy and ecology of production and positively affects on the properties of concrete in both the fresh and hardened state. The aim of this bachelor's thesis was to improve its use in concrete, using a minimum void fraction of dry mix cement-fly ash.
|
|
|
SCC with secondary raw materials
Ťažká, Lucia ; Ťažký, Tomáš (referee) ; Hela, Rudolf (advisor)
Bachelor thesis is focused on the possibility of using secondary raw materials and their application to the production of SCC. Large part deals with impurities of type I and its application results mainly from abroad. Furthermore, this work examines the impact of different types of impurities on the resulting concrete durability in various aggressive environments. The practical part is focused on the use of chemically non-reactive additives of type I instead of the commonly used additives of type II which are used to replace part of cement and the resulting design and manufacture of low-strength SCC using appropriate additives.
|
|
| |
|
|
Rehabilitation technology of embankment dams by using suitable types of waste
Michalčíková, Magdaléna ; Kulísek, Karel (referee) ; Drochytka, Rostislav (advisor)
The subject of this work is to find an optimal technology for repairing existing embankment dams with emphasis on simplicity and ecological scalability. Next, secondary energy and waste materials will be evaluated as a partial replacement of a quality montmorillonitic clay. The aim of this will be to maximize the use of these waste materials. In the end a selection of materials for the locality will be made. The use of appropriate types of waste for repairs of embankment dams with clay based grouting compound technology has a great potential, especially with those dams that are not fulfilling their function due to their age.
|
guest ::
